Chemistry Assignment

The definition of a gas is a phase that

Answer: A gas takes both the shape and volume of its container.

Matter

Answer: Anything that has mass and takes up space

First step of the scientific method

Answer: observation

When Dalton developed Atomic Theory, he

Answer: tested his theory by making predictions which when he examined the prediction experimentally, the results supported his atomic theory. The predictions and results later resulted in the Law of Multiple Proportions.

Mass

Answer: the amount of matter in an object

Weight

Answer: A measure of the force of gravity on an object

A chemical is placed on a balance in an airtight container. The balance initially reads 150.0 g.150.0 g.
What will the balance read after the chemical is ignited and completely burned?

The balance will read less than 150.0 g.150.0 g.
The balance will read greater than 150.0 g.150.0 g.
It is not possible to know what the balance will read without knowing the identity of the chemical.
The balance will read 150.0 g.

Answer: The balance will read 150.0 g.